Building-block.



No. 723,404. I PATENTED MAR. 24, 1903-.

J. H. PFIRSGH. BUILDING BLOCK.

APPLICATION FILED NOV. 19, 1902.

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UNITED STATES:

PATENT OFFICE.

JOHN H. PFIRSCH, OF MARTEL, OHIO.

BUlhDlNG'-BLOCK.

SPECIFICATION forming part of "Letters Patent N 0. 723,404, dated March 24, 1903.

- Application filed November 19,1902. Serial No. 131,974 (No model.)

To all whom) it may concern: r

Beit known that I, JOHN H.'PFIRSCH, acitizen of the United States, residing at Martel, in the county of Marion and State of Ohio,

have invented certain new and useful Im-;

provements in Building-Blocks, of which the following is a specification, reference being bad therein to the accompanying drawings.

This invention relates to improvements in building-blocks.

The object of the present invention is to provide a block of the character mentioned embodying in its construction simple and efficient means for locking the same with the correlated blocks of a wall when assembled therein, and also for simple and efficient means whereby the'same is enabled to effectually shed moisture, and thereby prevent the latter penetrating to the interior of the wall through the joints between the blocks.

A further object of the invention is to provide a buildingblock the construction of which is such as to prevent the same sliding.

from its position upon anotherduring the period when the cement between the blocks is hardening, thus insuring maintenance of the proper relation between the superimposed. blocks and effectually holding the same to In the drawings, Figure 1 is a perspective.

view of a building-block constructed in accordance with the present invention. Fig. 2 is a transverse sectional View of a series of the herein-described blocks, showing their relative positioiis when assembled in a wall.

Referring to the drawings, the numeral 1 designates the body of the herein-described block, which body is formed of suitable material and is preferably hollow, as shown, although the same may be solid, as in the ordinary construction of building-block. In the preferred form, as shown, the body 1 is also provided with a longitudinally-extending vertically-disposed partition 2, through the memoist-u re throughthe joints.

dium of which the top and bottom of the block are supported and thereby strengthened; but this partition is not essential.

As before premised, the present invention contem plates vthe provision of simple and eflicient means for locking the blocks together and also preve n ting the penetration of inoisrangement to the ribs 3, with longitudinallyextending grooves 4. By this arrangement it will .be observed that a rib and a groove are provided at both the upper and lower surfaces of the body 1, the ribs being preferably arranged at the outer upper and lower inner edges of the body, while the grooves are arranged at the upper inner and lower outer edges thereof. By this construction a better locking of the superimposed blocks is obtained.

In order to prevent penetration of moisture through the joints, it is desirable to render the npperand lower surfaces of the body somewhat irregular and to provide interlocking partswhich are incapable of conducting This is efiected by providing the upper outer and lower inner edges of the bodyv with beveled or chamfered faces 5 and providing the upper inner and lower outer edges of said body with inwardly-directed inclined contact-flanges 6. This arrangement provides an inclined'contact-flange atdiagonally opposite edges of the block and in such position as to engage the beveledor chamfered faces of the contiguous blocks, and, moreover, it will be observed that the arrangement described also provides such an arrangement that the outer edges of the blocks when joined together will absolutely preclude moisture working up the chamfered or beveled surfaces. This is due to the further fact that the inclined contactfaces of the block are reversely arranged, while the chamfered or beveled faces are also reversely arranged. 7

Through the medium ofthe ribs 3 and the grooves 4 the blocks may be interlocked, and when so positioned sliding of the same is ab- ICO solutely precluded, and it will of course be understood that the usual cement composition is employed at the joints between the blocks for holding the same together.

Having thus described the invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A building-block havinga rib extending longitudinally thereof projecting from one horizontal side of the same adjacent to one vertical side thereof, a corresponding rib on 3. A block having the central portions of the opposite sides thereof horizontally disposed, and side portions bordering said central portions arranged at angles to the latter, a rib arranged between one of said angle portions and said central portions of each side, and a groove located between the other angle portion and said horizontal portion of each side, substantially as described.

4:. A block having the major portions of its upper and lower sides fiat and horizontally disposed, and angularly-arranged portions bordering said major portions extending from the same to the vertical sides of the block, said angularly-arranged portions at the outer side of the block being deflected downwardly from the major portions of said flat sides, sub

stantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. PFIRSCH. Witnesses:

W. G. HAAS, I. T. MCLAIN. 

